Totally subjective opinion to which we are all entitled of course. I use a power washer regularly as do professional detailers without issue. There's a knack to being sympathetic around seals etc. I would never in a month of Sundays touch my car with a sponge. That gives me the heebie jeebies just thinking about it. A sponge is nothing more than a grit capture to beggar up your clear coat. .Bucket and Sponge is the only safe way for Washing Cars. Seals on Cars are only designed to stop rain water / spray at very low pressure. Not the High Pressure from Pressure Washers. They cause damage by forcing water past seals where it was never meant to go. They do not even work to wash Road film away. Complete waste of time and money.
But each to their own as the fella said wheh he kissed the cat.